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{ "id": 27260, "url": "https://patchwork.libcamera.org/api/covers/27260/?format=api", "web_url": "https://patchwork.libcamera.org/cover/27260/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260707-extensible-stats-v5-0-f5539feb0f46@ideasonboard.com>", "date": "2026-07-07T12:29:44", "name": "[v5,0/2] ipa: libipa: Add support for V4L2 ISP statistics", "submitter": { "id": 143, "url": "https://patchwork.libcamera.org/api/people/143/?format=api", "name": "Jacopo Mondi", "email": "jacopo.mondi@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/27260/mbox/", "series": [ { "id": 6043, "url": "https://patchwork.libcamera.org/api/series/6043/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=6043", "date": "2026-07-07T12:29:44", "name": "ipa: libipa: Add support for V4L2 ISP statistics", "version": 5, "mbox": "https://patchwork.libcamera.org/series/6043/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/27260/comments/", "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id AEA93C3323\n\tfor <parsemail@patchwork.libcamera.org>;\n\tTue, 7 Jul 2026 12:30:10 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6BDCE66075;\n\tTue, 7 Jul 2026 14:30:09 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 4F089658BF\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 7 Jul 2026 14:30:07 +0200 (CEST)", "from [192.168.1.182] (93-46-82-201.ip106.fastwebnet.it\n\t[93.46.82.201])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 799D6673;\n\tTue, 7 Jul 2026 14:29:17 +0200 (CEST)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"nOm3A/RH\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1783427357;\n\tbh=dQMwIy0yojOjmppg7t0GCB6xqOJhON17YNqSITg5YFE=;\n\th=From:Subject:Date:To:Cc:From;\n\tb=nOm3A/RHsBW1MJHzEPyv2dyk2oGgdC3ra8UX2Ai8P/pjFSmjE72lBxeVXJaXNr3zH\n\t8ZgAEUQ3bNOb3tOVexHvx4I9o6QhQhs8UszahECBvn9I5RU7RtrtQa2++iCgCUtvsu\n\t/j6eFq+lTvalVvGRJwLhFysgaUfaZKXR/ayNqoDA=", "From": "Jacopo Mondi <jacopo.mondi@ideasonboard.com>", "Subject": "[PATCH v5 0/2] ipa: libipa: Add support for V4L2 ISP statistics", "Date": "Tue, 07 Jul 2026 14:29:44 +0200", "Message-Id": "<20260707-extensible-stats-v5-0-f5539feb0f46@ideasonboard.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "X-B4-Tracking": "v=1; b=H4sIADjxTGoC/33NQQ7CIBCF4as0rMXAFEp15T2MCwamlkSLgaapM\n\tb276KqL6vJ/yXzzYplSoMyO1YslmkIOcSihdxVzvR2uxIMvzUBAI7TQnOaRhhzwRjyPdszcGID\n\tWICm0LStnj0RdmL/k+VK6D3mM6fn9MMnP+gebJBdcoG6cQYnom1PwZHMcMNrk9y7e2cecYO2YD\n\tQeK4ztnD/XB+hrMD6deO+2GUxenA2mURUUS1A9HrRwJG44qDgkFumukkQQbzrIsb1ZOX66PAQA\n\tA", "X-Change-ID": "20260505-extensible-stats-772287be4ba8", "To": "libcamera-devel@lists.libcamera.org, \n\tAntoine Bouyer <antoine.bouyer@nxp.com>", "Cc": "Jacopo Mondi <jacopo.mondi@ideasonboard.com>, \n\tKieran Bingham <kieran.bingham@ideasonboard.com>, \n\tPaul Elder <paul.elder@ideasonboard.com>", "X-Mailer": "b4 0.14.3", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=1705;\n\ti=jacopo.mondi@ideasonboard.com; h=from:subject:message-id;\n\tbh=dQMwIy0yojOjmppg7t0GCB6xqOJhON17YNqSITg5YFE=;\n\tb=owEBbQKS/ZANAwAKAXI0Bo8WoVY8AcsmYgBqTPFNRabcjsXdaXe9V2SLgnq/k5JMk61WBwIk/\n\t5ZHizsLs0+JAjMEAAEKAB0WIQS1xD1IgJogio9YOMByNAaPFqFWPAUCakzxTQAKCRByNAaPFqFW\n\tPBSnD/4l4JvHMf7Y+moorvRsiWARI7YRix3uEVGaVb2+x6pZYcrNCvj4CS+OE7NrOQQtGtavKHt\n\t3hIVNzbXnfkLDhV5iTfOXWPPrHLEZPbqCW+3OLpLSkuZujRW+u0EdNX8HpPZecuux7sPyxpbG12\n\tOIZF7HkK8S1rnxyK8qwg0/nNeGo27tH0JaBVw8xhbAyvKbi0FVw4j/XlOvEDZrkrLyyT1gfVkF8\n\tMb60HWQqoZBCGX/FxhCtEyuzzXGpyTzMO1DWVdqovu1LJs2yh4MzqnhWtCxg+/SoMIXwNHQUPIi\n\tNG9/9vdO0UGLoSgikqsrqmcDw/2yO00iQHTKJSiaNdZIo0057q6a4Ckxsmu8+xo6IfDtpddfm6n\n\t64HrfH2Vs8TUMpS/rGKo+plill5XC3fnlwvf5Ej0tPv0J0KyMd74KZRhNO6uK36nm+DaHuXZ+8N\n\t07qd3CcispdtF7HPkoa/rx2sO/S9xJ85ohWEoeZ+/VhnUHdnF9a+hXAYQHzdDaeQfXSE7SZu76T\n\t2Oue9jVnem3JSptMVtch+LvZsb83J4QTLI7zBZ421Jp0qwjUcPMab0JzzAw0DqjmRB3vz/hy1Tp\n\tD8Hg2nZTyBsW2t3wp0cq+4nIEdgN/lVYfH1G+VuoiBBhNfJtMWB+LIMWkyZNleN9e2tMW0SZ+cU\n\tcz3MlMsMsTrSBZg==", "X-Developer-Key": "i=jacopo.mondi@ideasonboard.com; a=openpgp;\n\tfpr=72392EDC88144A65C701EA9BA5826A2587AD026B", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Support for extensible stats has been submitted for review first by\nAntonie then broken-out to a dedicated patch series here:\nhttps://patchwork.linuxtv.org/project/linux-media/list/?series=24772\n\nWith the same spirit as V4L2Params, introduce a V4L2Stats class to help\nIPA modules handle a buffer of V4L2 ISP statistics.\n\nThere are currently no users in-tree of the class but we have an example\nuser in the RPP-X1 IPA module available at:\nhttps://gitlab.freedesktop.org/jmondi/libcamera/-/blob/v4h/jmondi/rppx1/src/ipa/rppx1/stats.h\nhttps://gitlab.freedesktop.org/jmondi/libcamera/-/blob/v4h/jmondi/rppx1/src/ipa/rppx1/algorithms/awb.cpp#L365\n\nSigned-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>\n---\nChanges in v5:\n- Update to v3 of kernel v4l2-stats\n- Add Paul's tags and address his comments on documentation\n\nChanges in v4:\n- Restore public constructor for V4L2Stats\n- Address Barnabas' comments\n\nChanges in v3:\n- Drop V4L2StatsBlock\n- Introduce V4L2StatsBase\n- Build a cache of stats block at construction time\n\nChanges in v2:\n- Address Kieran's and Barnabas' comment\n\n---\nJacopo Mondi (2):\n include: v4l2-isp: Update to support extensible stats\n ipa: libipa: Introduce V4L2Stats\n\n include/linux/media/v4l2-isp.h | 125 +++++++++++++--------\n src/ipa/libipa/meson.build | 2 +\n src/ipa/libipa/v4l2_stats.cpp | 243 +++++++++++++++++++++++++++++++++++++++++\n src/ipa/libipa/v4l2_stats.h | 67 ++++++++++++\n 4 files changed, 391 insertions(+), 46 deletions(-)\n---\nbase-commit: 709ad59a8d90af3570be1c8d02dee0ec9e011954\nchange-id: 20260505-extensible-stats-772287be4ba8\n\nBest regards," }